<html>
  <head>
    <script type="text/javascript">
      function go() {
        var canvas = document.getElementById("canvas");
        var ctx = canvas.getContext("2d");
        var image = document.getElementById("image");

        // Draw some orange
        ctx.fillStyle = "orange";
        ctx.fillRect(0, 0, 100, 100);

        ctx.globalAlpha = 0.25;
        ctx.drawImage(image, 0, 0);
      }
    </script>
  </head>
  <body onload="go()">
    <canvas id="canvas" width="200" height="200"></canvas>
    <img id="image" src="lime100x100.svg" style="display: none">
  </body>
</html>
